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The unity of science is a thesis in philosophy of science that says that all the sciences form a unified whole.
Even though, for example, physics and sociology are distinct disciplines, the thesis of the unity of science says that in principle they must be part of a unified intellectual endeavor, science. The unity of science thesis is usually associated with the view of levels of organization in nature, where physics is the most basic, chemistry the level above physics, biology above chemistry, sociology above biology, and so forth. Further, cells, organisms, and cultures are all biological, but they represent three different levels of biological organization.
The thesis of a unity of science simply says that common scientific laws apply everywhere and on all levels of organization. On some levels of organization, the scientists there will call these laws by another name, or emphasize the importance of one over another. For example, thermodynamics or the laws of energy seem to be universal across a number of disciplines. That is almost certainly because nearly all systems in nature operate using transactions in energy.
Science is a human endeavor, a part of our culture. It is unified in the sense that it is understood as a single endeavor, and there are not scientists studying alternative realities. To the extent that they do, however, one could argue that they are not unified. It is the perception of a single reality that results in a unity of science.
Separately, science is also apparently on a path toward simplification or actually a "universalization" of discrete scientific theories about energy that physicists call unification. This has lead to string theory and its derivatives, and is probably related to the notion that, at bottom, there is only the energy that was released in the big bang, and really nothing else.
- Boyd, Richard, Philip Gasper and J. D. Trout eds. (1991) Philosophy of Science Cambridge: MIT Press.
- Oppenheim, Paul and Hilary Putnam (1958) "Unity of Science as a Working Hypothesis" in Minnesota Studies in the Philosophy of Science (vol. 2) pp. 3-36. Reprinted in Boyd et al.
- Fodor, Jerry (1974) "Disunity of Science as Working Hypothesis" in Synthese (vol. 28) pp.77-115. Reprinted as "Special Sciences" in Boyd, et al.
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